Faculty Profiles - ANDO, Kosei

Papers - ANDO, Kosei

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Analysis of shear creep properties of wood via modified Burger models and off‑axis compression test method Reviewed

Kanon Shimazaki, Kosei Ando

Wood Science and Technology Vol. 58 page： 1473 - 1490 2024

Variation of shear creep properties of wood within a stem: effects of macro‑ and microstructural variability Reviewed

Kosei Ando, Ryota Nakamura, Takashi Kushino

Wood Science and Technology Vol. 57 page： 93 - 110 2023

Dependence of Poisson's ratio and Young's modulus on microfibril angle (MFA) in wood Reviewed

Ando K., Mizutani M., Toba K., Yamamoto H.

Holzforschung Vol. 72 ( 4 ) page： 321-327 2018

Influence of a wide range of moisture contents on the Poisson's ratio of wood. Reviewed

Mizutani, M.; Ando, K.

Journal of Wood Science Vol. 61 ( 1 ) page： 81-85 2015

Time dependence of Poisson's effect in wood IV: influence of grain angle. Reviewed

Kawahara, K.; Ando, K.: Taniguchi, Y.

Journal of Wood Science Vol. 61 ( 4 ) page： 372-383 2015

Time dependence of Poisson's effect in wood III: asymmetry of three-dimensional viscoelastic compliance matrix of Japanese cypress. Reviewed

Ando, K.; Mizutani, M.; Taniguchi, Y.; Yamamoto, H.

Journal of Wood Science Vol. 59 ( 4 ) page： 290-298 2013

Effects of aging on the vibrational properties of wood Reviewed

Noguchi, T.; Obataya, E.; Ando, K.

Journal of Cultural Heritage Vol. 13 page： S21-S25 2012

*Determination of three-dimensional viscoelastic compliance in wood by tensile creep test. Reviewed

Taniguchi, Y.; Ando, K.; Yamamoto, H.

Journal of Wood Science Vol. 56 ( 1 ) page： 82-84 2010

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

The objective of this study is to extend the hitherto biaxial, two-dimentional approach to determination of the viscoelastic functions in wood to three dimensions, by making measurements to obtain all components of the viscoelastic compliance tensor concerning the normal strain. The three-dimensional discussion of wood's viscoelasticity has hardly been made, though wood has three axes of symmetry. In the present work, we determined the three-dimensional viscoelastic compliance concerning the normal strain in wood, by conducting the longitudinal-, tangential- and radial-tensile creep tests.

*Time dependence of Poisson's effect in wood I: the lateral strain behavior. Reviewed

Taniguchi, Y.; Ando, K.

Journal of Wood Science Vol. 56 ( 2 ) page： 100-106 2010

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

To understand the viscoelasticity of wood three-dimensionally, a longitudinal tensile creep test for twelve species was conducted to examine the changes with time in the lateral strain and the viscoelastic, i.e. apparent Poisson's ratio. The changes in the lateral strain (εT and εR) were similar to those in the longitudinal strain (εL). That is, during creep, the absolute value of lateral strain continued to increase with the gradual reduction in the increase rate; immediately after the removal of the load, it recovered abruptly; then, it recovered slowly and finally reached a certain value. The rate of increase in the longitudinal strain during creep was smaller than that in the absolute value of lateral strains. The apparent Poisson's ratio became large during creep because the lateral strain grew more than the longitudinal strain. The analysis of lateral strain by decomposition into three components, that is, the instantaneous strain, delayed elastic strain and permanent strain, has revealed that the lateral permanent strain in the transverse direction contributes most to the increase in the apparent Poisson's ratio during creep.

Time dependence of Poisson's effect in wood II: volume change during uniaxial tensile creep. Reviewed

Journal of Wood Science Vol. 56 ( 4 ) page： 350-354 2010

木材の物性を制御する微細構造の解析 Invited Reviewed

安藤幸世

TRACER ( 68 ) page： 2 - 5 2020.10

Recent studies on the Poisson's ratios of wood and wood-based materials Invited Reviewed

Kosei ANDO

Mokuzai Kogyo (Wood Industry) Vol. 66 ( 4 ) page： 144-149 2011

曲げ加工を利用した実演用製作教材 Reviewed

尾崎士郎、安藤幸世、内藤隆

木材工業 Vol. 66 ( 6 ) page： 279-283 2011

Fractography of old wood Reviewed

Kosei Ando, Azusa Takita, Yoshihiko Hirashima, Yasutoshi Sasaki

Nagoya University Forest Science ( 26 ) page： 1-7 2007.12

Microscopic processes of shearing fracture of old wood, examined using the acoustic emission technique. Reviewed

Ando, K.; Hirashima, Y.; Sugihara, M.; Hirao, S.; Sasaki, Y.

Journal of Wood Science Vol. 52 ( 6 ) page： 483-489 2006

Deformation behavior of wood under stress relaxation as cellular solids. Reviewed

page： 296-297 2005.7

木材のねじり疲労特性 Reviewed

安藤幸世, 山崎真理子, 渡辺純子, 佐々木康寿

木材学会誌 Vol. 51 ( 2 ) page： 98-103 2005

Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal)

木材の繊維方向を軸とするねじり疲労特性について検討した。得られた結果は以下の通りである。応力レベルが30～100％の範囲では応力レベルと疲労寿命回数の対数とに負の直線関係があった。周波数が大きい方が疲労寿命回数の多い傾向にあった。１サイクル毎のエネルギ損失の平均値は疲労寿命回数が延びるにつれ或る一定値に収束する傾向が得られた。このときの応力レベルの限界値は疲れ限度と考えられ、およそ30％と予測した。

Near-infrared spectroscopic study of the physical and mechanical properties of wood with meso- and micro-scale anatomical observation. Reviewed

Tsuchikawa, S.; Hirashima, Y.; Sasaki, Y.; Ando, K.

Spectroscopy Vol. 59 ( 1 ) page： 86-93 2005

Characteristics of wood as a porous material. Invited Reviewed

Ando, K.

Materials Science and Technology Vol. 42 ( 3 ) page： 121-126 2005

古材の強度特性（第３報）, ケヤキおよびアカマツの静的曲げ強度特性および衝撃曲げ強さ Reviewed

平嶋義彦, 杉原未奈, 佐々木康寿, 安藤幸世, 山崎真理子

木材学会誌 Vol. 51 ( 3 ) page： 146-152 2005

Language：Japanese Publishing type：Research paper (scientific journal)

建築解体材より採取した古材の無欠点小試片を用いて静的曲げ強さ、曲げヤング率、衝撃曲げ強さを求め、新材の値と比較した。アカマツ古材の静的曲げ強さ、ヤング率は新材より増加するなどの結果が得られた。アカマツ古材は新材に比べて強度増加を示すものもあるが、同時に脆性的性質を帯びているように見受けられ、この性質は、破断面の長手方向に及ぶ長さの減少、比例限度比の増加などとして現れていると考えられた。

古材の強度特性(第1報), ケヤキおよびアカマツの引張強度特性 Reviewed

平嶋義彦, 杉原未奈, 佐々木康寿, 安藤幸世, 山崎真理子

木材学会誌 Vol. 50 ( 5 ) page： 301-309 2004

Language：Japanese Publishing type：Research paper (scientific journal)

建築解体材より採取した古材の無欠点小試片引張試験を行い、新材の引張強さおよびヤング率と比較した。新材と比較対照古材の密度の平均値および分布形を合致させたうえでそれぞれの強度特性を比較するためモンテカルロシミュレーションを行った。その結果、ケヤキ古材は新材と比べて強さ、ヤング率ともに減少したが、アカマツ古材においては強さ、ヤング率ともに新材と変わらない結果も得られた。

古材の強度特性(第2報), ケヤキおよびアカマツの圧縮強度特性,せん断強さおよび硬さ Reviewed

平嶋義彦, 杉原未奈, 佐々木康寿, 安藤幸世, 山崎真理子

木材学会誌 Vol. 50 ( 6 ) page： 368-375 2004

Deformation behavior of wood under stress relaxation in a radial direction as a laminated annual-ring structure. Reviewed

Ando, K.; Morimoto, M.; Kubojima, Y.

Journal of Wood Science Vol. 50 ( 4 ) page： 381-382 2004

細胞レベルでの木材の変形・破壊とAE Invited

安藤幸世

アコースティックエミッション特別研究委員会資料 ( 115 ) page： 5-11 2001.7

Monitoring acoustic emissions to predict modulus of rupture of finger-joints from tropical African hardwoods. Reviewed

Ayarkwa, J.; Hirashima, Y.; Ando, K.; Sasaki, Y.

Wood and Fiber Science Vol. 33 ( 3 ) page： 450-464 2001

Monitoring acoustic emissions from finger-joints from tropical African hardwoods for predicting ultimate tensile strength. Reviewed

Ayarkwa, J.; Hirashima, Y.; Ando, K.; Sasaki, Y.

Holzforschung Vol. 55 ( 6 ) page： 652-660 2001

Predicting ultimate tensile and bending strengths of three finger-jointed tropical African hardwoods using acoustic emission. Reviewed

Ayarkwa, J.; Hirashima, Y.; Ando, K.; Sasaki, Y.

Southern African Forestry Journal Vol. 189 page： 53-62 2000

Effect of glue type on flexural and tensile properties of finger-jointed tropical African hardwoods. Reviewed

Ayarkwa, J.; Hirashima, Y.; Sasaki, Y.; Ando, K.

Forest Products Journal Vol. 50 ( 10 ) page： 59-68 2000

*Mechanism for deformation of wood as a honeycomb structure I: Effect of anatomy on the initial deformation process during radial compression. Reviewed

Ando, K.; Onda, H.

Journal of Wood Science Vol. 45 ( 2 ) page： 120-126 1999

縦引張り繰返し負荷によるスプルース材のアコースティック・エミッション挙動と内部摩擦 Reviewed

小原光博, 安藤幸世, 古田裕三, 金山公三

木材学会誌 Vol. 45 ( 3 ) page： 208-214 1999

複合応力(軸力・ねじり)下における木材の強度特性 Reviewed

山崎真理子, 佐々木康寿, 安藤幸世

木材学会誌 Vol. 45 ( 4 ) page： 297-305 1999

Mechanism for deformation of wood as a honeycomb structure II: First buckling mechanism of cell walls under radial compression using the generalized cell model. Reviewed

Ando, K.; Onda, H.

Journal of Wood Science Vol. 45 ( 3 ) page： 250-253 1999

*Variability of fracture toughness by the crack tip position in an annual ring of coniferous wood. Reviewed

Ando, K.; Ohta, M.

Journal of Wood Science Vol. 45 ( 4 ) page： 275-283 1999

Acoustoelastic phenomena of wood.

Sasaki, Y.; Ando, K.

Proceedings of the Fifth World Conference on Timber Engineering 1998 Vol. 2 page： 296-303 1998

Acoustoelastic effect of wood II. Effect of compressive stress on the velocity of ultrasonic longitudinal waves parallel to the transverse direction of the wood. Reviewed

Sasaki, Y. ; Iwata, T. ; Ando, K.

Journal of Wood Science Vol. 44 ( 1 ) page： 21-27 1998

Piezoelectric behavior of wood under combined compression and vibration stresses I: Relation between piezoelectric voltage and microscopic deformation of a Sitka spruce (Picea sitchensis Carr.). Reviewed

Nakai, T. ; Igushi, N. ; Ando, K.

Journal of Wood Science Vol. 44 ( 1 ) page： 28-34 1998

Piezoelectric behavior of wood under combined compression and vibration stresses II: Effect of the deformation of cross-sectional wall of tracheids on changes in piezoelectric voltage in linear-elastic region. Reviewed

Nakai, T. ; Ando, K.

Journal of Wood Science Vol. 44 ( 4 ) page： 255-259 1998

ハニカム細胞構造体としての木材の横圧縮変形機構－放射組織の影響－ Invited

安藤幸世、天岸知樹、恩田仁

日本材料学会学術講演会講演論文集 Vol. 47 page： 129-130 1998

一般化した細胞壁構造による横圧縮変形機構について Invited

安藤幸世

平成9年度日本木材学会レオロジー研究会講演要旨集 page： 5-11 1997.12

Acoustoelastic effect of wood I. Effect of compressive stress on the velocity of ultrasonic longitudinal waves parallel to the longitudinal direction of the wood. Reviewed

Sasaki, Y. ; Iwata, T. ; Kuraya, K. ; Ando, K.

Journal of the Japan Wood Research Society Vol. 43 ( 3 ) page： 227-234 1997

Mechanical responses of wood to repeated loading. Reviewed

Kohara, M. ; Ando, K. ; Okuyama, T.

Transactions of the Materials Research Society of Japan ( 20 ) page： 52-55 1996

Fracture toughness and acoustic emission characteristics of sugi(#ICryptomeria japonica#I). Reviewed

Sato, K. ; Honda, T. ; Ando, K. ; Kubo, T.

Res. Bull. Univ. For. Tokyo Univ. Agric. Technol. ( 33 ) page： 19-26 1995

Relationships between the morphology of micro-fractures of wood and the acoustic emission characteristics. Reviewed

Ando, K. ; Ohta, M.

Journal of the Japan Wood Research Society Vol. 41 ( 7 ) page： 640-646 1995

Acoustoelastic effect of wood. Reviewed

Sasaki, Y. ; Iwata, T. ; Kuraya, K. ; Ando, K.

Journal of the Japan Wood Research Society Vol. 41 ( 12 ) page： 1173-1175 1995

Direct Observation of Micro-fracture Process of Wood by SEM and Its Acoustic Emission Characteristics under Tension Test. Reviewed

Proceedings of the 9th National Conference on Acoustic Emission page： 85-90 1993

Bending fracture toughness and Acoustic emission characteristics of wood Reviewed

Res. Bull. Univ. For. Tokyo Univ. Agric. Technol. ( 30 ) page： 11-19 1992

Fracture Toughness and Acoustic Emission Characteristics of Wood II., Effects of grain angle Reviewed

Journal of the Japan Wood Research Society Vol. 38 ( 4 ) page： 342-349 1992

Fracture Toughness and Acoustic Emission Characteristics of Wood I., Effects of the location of a crack tip in an annual ring Reviewed

Journal of the Japan Wood Research Society Vol. 37 ( 12 ) page： 1129-1134 1991

Fracture mechanism and acoustic emission characteristics of wood. Reviewed

Ando, K. ; Ohta, M. ; Okano, T.

Mechanical Behaviour of Materials - VI Vol. 4 page： 129-134 1991

AE Caracteristics and Structure of Wood Reviewed

Proceedings of the 7th National Conference on Acoustic Emission page： 83-88 1989

Fracture Toughness and AE Characteristics of Sugi Wood

Proceedings of the 33rd Symposium on Physical and Chemical Aspects of Ultrasound. page： 98-100 1988

Effect of Species and Moisture Content on Fracture Toughness and AE Caracteristics in Wood Reviewed

Proceedings of the 6th National Conference on Acoustic Emission page： 19-24 1987

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Papers - ANDO, Kosei